to clarify, the tnt minecarts are not set off using fire or redstone, but by just dropping them off from a high place and letting them detonate upon impact with the ground.
all examples in the picture are produced using /summon tnt_minecart ~ arbitrary y-coordinate ~
from what I've seen, the effect of the issue is the most prominent when arbitrary y-coordinate is a large number.
the still issue occurs after updating to 1.18.12
@ @unknown thanks a lot, it works for me
this bug still persists as of 1.19.30