When striders come into contact with lava flowing directly downward they will continuously swim upwards and eventually get stuck.
Steps to Reproduce:
Create a source of lava flowing downward
Spawn a strider inside of it
Observed Results:
The strider will keep swimming upwards until it gets stuck
Expected Results:
The strider would either avoid entering the flowing lava, or at least not continuously go upwards
Screenshots/Videos:
[media]
Notes:
This is primarily noticable in lava lakes where often times they will simply rise to the top of the nether roof and not move.
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Is this still an issue in 20w20b?

Yes, confirmed for 20w20b
Can confirm in 20w48a.

Can partially reproduce in 1.17.1. They are unable to pathfind back to the lava lake, but they are not shivering anymore.
I'd like to request ownership of this issue as the original poster is inactive since 2020, and the issue contains outdated information (The shivering part is fixed now, pathfinding is not)