The version in the new OSMC update is probably really up to date, I just had to delete the EPG cache in the Kodi PVR settings. All data was then re-downloaded and all programs are now displayed correctly again.
Big apologies again, I was too hasty in my complaint.
Waipu is currently changing their API very often. The developer of the waipu addon (flubshi) does a good job in quickly providing new addon versions for this API changes.
Unfortunately the addon in OSMC is only updated in OSMC´s major releases.
Is there any other way to update this addon more often in OSMC? Or can anyone provide actual builds of the addon for updating manually within OSMC?
You would need to build it from source or wait for OSMC releases. It’s unclear to me why they would change their API so frequently as this must be breaking a lot of clients