Since the start of this year, I am finding a problem with the BA website not showing connecting flights and available to book, this is for route Glasgow - A Coruna.

Search produces the following answer: Sorry, we have no flights available for this route (sample dates 18-28 April return)

However, when searching in stages (Glasgow - Madrid) and then (Madrid - A Coruna) the flights are indeed there for those dates.

I have always booked these flights as one ticket with no issues, and this is happenning since 2025.
The issue is also showing in Iberia's website; where I noticed in the search an incorrect code for A Coruna airport shows in search:LCG and YJC, latter being incorrect

When doing a search, no matter the dates, results appear but when selecting the message of no flights available shows.

I suspect there may be an issue in the data information, or something specific on this route; tried Customer Service with no luck, and the issue has been persisting for a few weeks.