There is a problem with the frequency scale if you zoom in closely on the waterfall
The longer vertical lines are supposed to be round frequencies
wrong: 13532 → 13532 → 13533 → 13533 → 13533.5
good: 13531.5 → 13532 → 13532.5 → 13533 → 13533.5
(https://i.imgur.com/DMhInjS.jpeg)
Additionally, the frequency scale canvas needs to have a little more height because the font is truncated.
(https://i.imgur.com/056t5hb.jpeg)
Regards
linkz
Will be fixed in the coming 1.5.4