When the player or mobs moves up from the side of the honey block, player or mobs will not be slowed down by the honey block or show the particles.
Affect the following situation:
Using riptide
When the player swims up
Using elytra with firework rockets
Leaning on the side of the honey block and jumping
Spider climbing up
I am technically sticking to the honey blocks because I slide down afterward, but there are no particles shown.
Edit: The old bug report I did was marked as "Resolved as Intended", yet I still suggest that this is something which should be tweaked (Being slowed down by honey blocks even when moving upwards). However, if someone at Mojang marks this report as intended again, I shall respect Mojang's opinion and not upload the third report.
Please do not duplicate your reports. Instead a comment on the report (which you did), on the subreddit or on the Mojira Discord.