When attacking any mob while the runningAndSwimmingConsumesStamina config option is set to true, attacking a mob causes the mod to forget you were swimming / sprinting / etc.

This does not affect paragliders (as you can't attack while using one anyways).

Here's a recording of both instances happening. This was running on 1.20.1 with only Fabric API and Paragliders installed.

You can also see me very briefly stop swimming / sprinting when attacking even though I haven't let go of the sprint key, not sure why this happens but this could be causing the aforementioned issue.