Can reproduce in 1.20.1
So I suppose this is not an actual bug
Isn’t this supposed to be reported at https://report.bugs.mojang.com/servicedesk/customer/portal/7 ?
The way of velocity being calculated when sliding has changed since 1.21.2 with 2 new methods to implement the function, so this could have been done in purpose rather than a bug
It seems that when Mojang tried to fix MC-275537 , they added a factor to velocity calculation, affecting all entities. But the mentioned bug is actually caused by the change of ticking of living entities, so the solution wrongly affected non-living entities, resulting in this bug