procps' watch together with ps command truncates command lines

The setup is I have two folders now under my current directory, busybox-1.36.1 and procps-4.0.4, and I also have a service languagetool running with DynamicUser=yes. Now observe the different behaviour: Legend: ✅ Doesn't truncate; ❌ truncates. ### busybox watch & busybox ps ✅

./busybox-1.36.1/bin/watch './busybox-1.36.1/bin/ps aux | grep languagetool'

Every 2.0s: ./busybox-1.36.1/bin/ps aux | grep languagetool                                                                           2025-03-17 23:20:02

1026972 61534    39:36 java ...languagetool...
4053857 mathiass  0:00 ./busybox-1.36.1/bin/watch ./busybox-1.36.1/bin/ps aux | grep languagetool
4053882 mathiass  0:00 sh -c -- ./busybox-1.36.1/bin/ps aux | grep languagetool
4053884 mathiass  0:00 grep languagetool

### busybox watch & procps ps ✅

./busybox-1.36.1/bin/watch './procps-4.0.4/bin/ps aux | grep languagetool'

Every 2.0s: ./procps-4.0.4/bin/ps aux | grep languagetool

languag+ 1026972  0.1 13.6 14468788 4464816 ?    Ssl  Mar04  39:38 java ...languagetool...
mathias+ 4057218  0.0  0.0   4676  2244 pts/32   S+   23:35   0:00 ./busybox-1.36.1/bin/watch ./procps-4.0.4/bin/ps aux | grep languagetool
mathias+ 4057222  0.0  0.0 231736  3788 pts/32   S+   23:35   0:00 sh -c -- ./procps-4.0.4/bin/ps aux | grep languagetool
mathias+ 4057224  0.0  0.0 230732  2520 pts/32   S+   23:35   0:00 grep languagetool

### procps watch & procps ps ❌

./procps-4.0.4/bin/watch './procps-4.0.4/bin/ps aux | grep languagetool'

Every 2.0s: ./procps-4.0.4/bin/ps aux | grep languagetool

mathias+ 4056463  0.0  0.0 230836  3320 pts/32   S+   23:31   0:00 ./procps-4.0.4/bin/watch ./procps-4.0.4/bin/ps aux | grep languagetool
mathias+ 4056540  0.0  0.0 230836  1532 pts/32   S+   23:32   0:00 ./procps-4.0.4/bin/watch ./procps-4.0.4/bin/ps aux | grep languagetool
mathias+ 4056541  0.0  0.0 231736  3556 pts/32   S+   23:32   0:00 sh -c -- ./procps-4.0.4/bin/ps aux | grep languagetool
mathias+ 4056543  0.0  0.0 230732  2244 pts/32   S+   23:32   0:00 grep languagetool

### procps watch & busybox ps ✅

./procps-4.0.4/bin/watch './busybox-1.36.1/bin/ps aux | grep languagetool'

Every 2.0s: ./busybox-1.36.1/bin/ps aux | grep languagetool                                                                nixos: Mon Mar 17 23:33:31 2025

1026972 61534    39:38 java ...languagetool...
4056826 mathiass  0:00 ./procps-4.0.4/bin/watch ./busybox-1.36.1/bin/ps aux | grep languagetool
4056831 mathiass  0:00 ./procps-4.0.4/bin/watch ./busybox-1.36.1/bin/ps aux | grep languagetool
4056832 mathiass  0:00 sh -c -- ./busybox-1.36.1/bin/ps aux | grep languagetool
4056834 mathiass  0:00 grep languagetool

## Question It seems odd that in every other case the commands behave as I expect them to, except when trying to use both ps and watch from procps. Does anybody know what is going on here?