The BJReplay repository at GitHub - BJReplay/ha-solcast-solar: Solcast Integration for Home Assistant is currently awaiting a HACS pull request review before it can be included in the searchable integrations.
Until that time, all fixes and enhancements will be released as a beta version.
The current ‘latest’ release there is v4.0.31, with a ‘beta’ v4.0.34 under active community test. v4.0.35 is carrying an enhancement, and that shoud not be too far away. Open PRs.
So turn on the ‘beta’ releases slider in HACS download. There are performance and stability improvements for you to embrace, and an opportunity provide feedback (both positive and negative) in the discussions.
With 
to all,
@autoSteve.