My only concern now is about that bug 13505 , which has not been resolved yet. Do you use HA Energy Dashboard?
I wouldn’t worry about it too much. There is a topic mentioned in the Github thread The OP said he didn’t get is working at the time, however he didn’t wrote at a later time if his issues were resolved. Someone else said he saw improvements after a HA update.
There aren’t any other people reporting similar problems in the thread on github or in the forum topic.
However The SlimmeLezer is by Zuidwijk is widely used, with good reviews and is actively maintained. So it probably is fine.
I use the HA dashboard, however with a USB cable to the p1 port, no problems here.