Referring to https://bugs.mojang.com/browse/MC-166508
This bug is marked as fixed in 1.15 pre3, however i still experience this issue in the same way as described there.
Video recorded with 1.15 pre3:
MC-166805
Chunk render glitch not fixed
Resolved
Duplicate
0
LiquidDev
(Unassigned)
Unconfirmed
(Unassigned)
1.15 Pre-release 3
Retrieved
Ask in the comments of that ticket to get it reopened.