Scrolling Text restarting on update from Home Assistant

I’m new here having only just started out using WLED.

I’m setting up some scrolling text on an LED matrix to display some values from entities within Home Assistant. Following some videos, I set up a Rest command to do it and it worked fine for a few days. When an entity value got updated (in my case the power coming from solar panels) the new power would be sent as a string like “Power now - 250W, Yield today - 1.5kWh”. The new string would replace the old scrolling string with no change in where it was in the scroll. That was what I wanted.

I noticed today, however, that now when a new string is sent the scroll jumps back to the start. This is annoying as the power can change several times within the time it takes the scrolling to get through the whole string; often, it never gets to the power value!

I’ve not changed anything and I have no idea why the behavior has changed. Help appreciated.

Thanks