USB tethering & charging

I am experiencing weird problem related to charging my Android phone. Most of the time I have phone connected to laptop and use it as 4G/5G modem. I noticed that compared with older phones it draws more power from wall. Unfortunately USB ports on laptop provide only small power. I haven't measured it but guess it is 500 mA. It is sufficient to power the phone and also charge it. But the charging is very slow in the range 1-3 % / hour. Therefore I bought USB hub with charging functionality and inserted it between android phone and laptop. This USB hub have external 2A power input. Now the charging speed is acceptable (10-15% / hour). It is not super fast but its OK. But there are two problems: 1. If i physically disconnect USB hub from laptop and connect phone to one of USB ports, it starts charging. After about second or two charging stops. Disconnecting and connecting cable again doesn't help. But I noticed that if I reconnect USB cable that is powering hub, charging successfully starts. What is the reason for this behavior ? This is not cricitical problem for me. I can connect the phone directly to USB wall charger and there is no problem with this. But I would like to understand this. 2. Second more sinister problem is that sometimes while tethering internet connection in above configuration the phone charging stops. For a few months I thought that this is random problem which happened several times per month. After few months experience I think it is somehow related to USB headset I am using for internet calls. This problem with charging happened twice when I had long internet call. After few hours I noticed that phone battery charge level dropped 15-20 %. It is not a big deal when the battery is new. It could be problem when the battery will become older. The phone will then shutdown which is not acceptable because I use it to connect to my employer while I am working from home. It is probable that phone battery aging is accelerated in this configuration because the battery is most of the time fully charged. This problem with occasionaly not charging happens whether there is USB hub between phone and laptop or not (so the phone is connected to laptop directly). To me it seems as serious bug. Battery powered devices like this phone are on market more than 10 years so I its weird that manufacturers were not able to tune out such basic functionality. All the software functions, nice graphics and frequent updates are of no use if you cannot power the device. What is the reason for this behavior and is there some workaround for it ? My hardware configuration: Samsung Galaxy A33 5G SM-A336BZKGEEE Laptop HP ENVY 15-as103nc AXAGON HUE-S2BP 4-Port USB 3.0 CHARGING Hub (with 2A power source) USB repeater AXAGON ADR-205, 5 m Headset Behringer BH470U My software configuration: One UI 6.0 Android 14 Core version 5.10.177-android12-9-27775596-abA336BXXS8DXA1 Windows 10 Pro 22H2 The phone has charging limited to 85% by using android function. I had enabled developer options and set automatic tethering (it is not fully automatic - I have to unlock screen to enable usb tethering). Don't know if this is related to above problems or not. **P.S. 21.4.2024** Adding some photos of USB hub. It is named "charging hub" but it cannot charge phone sometimes even without computer. Today I experienced with second USB hub from Vention which supports Power Delivery. The result is that I am not able to use tethering at all. Charging of phone when this USB hub is disconnected from computer is functioning in very limited set of cases. I must connect charger output to input marked with a lightning bolt symbol and phone must be connected to fixed USB-C output. For example when I connect phone to one of USB-A outputs I am not able to charge it. So it seems it is no problem of hub but phone. Or I have bad luck and bought two hubs from two different manufacturers which are broken. This is how this second hub looks like: