Currently decreaseLoanHighHolds blocks checkout in SCO, with no explanation or option. This is frustrating to patrons and doubles work. It would be preferable if the SCO had admin settings to A) Allow checkout and highlight the reduced loan period. B) Allowed the patron to see a modal with the reduced loan time and choose to check the item out or not. C) Allow to block the checkout with a defined message.
If this effects SIP as well, it would be good to allow the same options for SIP.
I'm waiting for another library to confirm, but I think Self Checks via SIP allow the item to go through on the shortened loan period without a block or warning. I would like to at least mimic this behavior on the built in self check.
I have confirmed that 3rd party self checkouts do not block high demand items like Koha's self check does. This behavior is inconsistent depending on if you are using SIP self check vs Koha self check. I am going to change this from enhancement to a bug. I think the desired behavior is to not hinder the patron, and let them check out, even if they are unaware that the checkout period is shorter. However, information on the screen and receipts would give them that information. The developers could always post a warning on the screen or require interaction in these cases, but I think Koha's self check should fall in line with current SIP behavior.
I agree that this is a bug, and it sound correct to me that self-checkout should not block the checkout. I disagree that this is a blocker based on our bug reporting guidelines https://wiki.koha-community.org/wiki/Bug_Reporting_Guidelines#Severity