So with the confirmation, I might as well infuse some random legendary to over 300 and later on infuse a lesser value spindle with a blue I have with 290+ value and afterwards the random legendary I infused with the 310 spindle.
I'd consider taking a 300 Spindle from the kiosk and holding onto it until after the fix, to see if it only goes to 290 instead of 280 since it'll be in your possession already.