As it is now, the e1rm chart doesn’t have units but the data point for each day is recorded based on the units you used that day. So, for example, if your bench e1rm is 275lbs one day then 125kg the next the graph looks like your bench went down 50% because it just has the first as 275 and the second as 125.

Probably an edge case because most people don’t swap units from comp lifts a lot and this can probably be addressed by swapping the units back before finishing the workout but that is kind of an annoying “solution”