Yes, this fix, and all others that we released in the meantime, will be included in the upcoming beta.
We have actually changed the version number from 5.4.1 to 5.5 since there’s going to be more changes in that released than previously anticipated.
We don’t have an exact ETA for the 5.5-beta2, but on this page MainWP Early Release - MainWP WordPress Management, you can find up to date information, download the current 5.5-beta1, and subscribe to get notified when we release future betas or RCs.
The fix for the issue was included in today’s MainWP Dashboard 5.4.0.17 release.
Thanks again for reporting this to us.
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