JohnB Strange I've never had that issue before and I've been using litespeed + LSCahce for at least past 7 years. There was the issue of it not purging the cache properly after WordPress ToolKit on Plesk did updates, but there was helper plugin someone wrote that sort of resolve that.
@twest I've had litespeed enterprise (default config) easily handle 250K hits in a day on a single site, server load barely even rose. (this was 5 years ago) That was with a single worker process license on a dedicated server, with CF Pro serving Edge cache. E1270-v3 was the CPU if I remember correctly.
As for using LSWS or OLS, you're likely leaving performance on the table by using caching plugins that aren't LSCache with litespeed. As you won't get server side cache options.
As for lsphp, I too thought it was awesome and loved cloudlinx + lsws. But ehance separates out the PHP layer into individual containers (customers) I don't think it will be using lsphp, as it's using php.fpm instead, the webserver sits atop of that. https://enhance.com/docs/php/ (someone correct me if I am wrong)
I've been running OLS for nearly a year now on enhance with some small and large sites. No issues to date, except Wordfence auto-update not working due to .htaccess reloads. (now implemented in recent appcd update)