In SH5 there is the 'sticky destroyer' or 'sticky ship' bug. Sometimes nearby ships - enemy or friendly - will enter escort mode and follow you wherever you go. I'm currently in the Med Sea and have 'picked-up' a Soldati Destroyer, a fine tool to complete my torpedo loadings
https://ibb.co/6vk7Vv5
When the time has come, when I encounter enemy units, I'll save the game and reload to 'unstuck' the ship's AI which then should attack the enemies. Let's see if this works or if SH5 has some bad surprises in petto...
Anyone already tried this with success?