Cart stucks and jitters when punched while going up and doing sharp turn

[Fixer-007]

Explanation: Cart stucks and jitters when punched while going up and doing sharp turn. Bug happens if I punch just near the top before the turn. If without punching - no problems.
Demo of the bug: https://imgur.com/a/3gTMb
Pic:

Minetest Game: 12 dec 2016
Reproduced on: Cash World server

[sofar]

Punching is weird, if you use enough powered rail and not punch the cart all the time, does it work properly?

[Fixer-007]

Yes, bug happens if I punch just near the top before the turn. If without punching - it will go nicely.
This rail is on live server, it was not rebuild yet to default cart mod since builder is AFK for now, adding more power rails should provide enough boost to go without punching it.

[sofar]

I'll certainly look at the punch weirdness, it's bothersome, but continuously punching isn't what I'd like to see in minetest_game anyway, and I hope players are not relying on it.

[paramat]

The intention is to use continuous power rails on climbs that provide a gentle uphill acceleration so that punching is not necessary, so i think this is low priority. It could almost be seen as punishment for mistreating the cart.
Are you still able to dig the cart to escape the situation?

[Fixer-007]

Are you still able to dig the cart to escape the situation?

yes

[paramat]

Ok not so bad then. We can tackle this after release.

[Fixer-007]

Since that Cash World server has boostcart mod, I decided to test this on localhost with carts instead, tried many times and had no problems. I guess I will close it and reopen if someone reconfirms it again.