Antoine Semenyo had a goal disallowed for offside after an extensive VAR review, which could have worsened Newcastle's 2-0 first-leg defeat.
Howe lamented the loss of spontaneity and instantaneous emotion in goal celebrations due to VAR, stating his first thought is now always whether there is an issue with the goal.
While acknowledging VAR's benefits in correcting clear and obvious errors, Howe remains hesitant, believing the game is much better without it for supporters.
In other news, defender Fabian Schar will be sidelined for three months following ankle surgery, potentially forcing Newcastle into the transfer market.