Incompatible with WP Fastest Cache?

I have loved Horizontal scrolling announcement for years. I have never had a problem with it until today. After updating to WordPress 5.0, updating my theme (Bridge) and Horizontal scrolling announcement plug-in, I noticed that when I cleared my site cache with another long used (and updated) plug-in, WP Fastest Cache, the cache would time out when it was cleared. Since I am not educated regarding computer coding, I used the tried and true technique of turning off my plugins and adding them back one by one. The long and short of it is that Horizontal scrolling announcement was the plugin that tripped this problem.

Is there anything I should do to try to fix this? I love Horizontal scrolling announcement.

Many thanks.