Short isoforms from Ensembl are expanded to full length Uniprot sequences

Retrieve ACTR8 from Ensembl and show products. Now fetch db refs for all sequences from uniprot and ensure that 'Trim sequences' is not set. Jalview helpfully says:
Your sequences have been verified against known sequence databases.
(Use Calculate | Show flanking regions to show enclosing sequence.)
To preserve data changes, save your alignment.

Sequence for ENSP00000419429 expanded from ARP8_HUMAN

Whilst that's great, ENSP..419429 is ACTR8-202 - which is shorter (and should be left as such).