Yes — based on these symptoms, the card is no longer trustworthy and should be replaced. If one card repeatedly causes errors in the same camera while another card does not, that strongly points to the card rather than the camera.

A practical check is to fully write data to the card and watch your computer’s system log for any I/O errors while reading or writing. If you see any I/O errors at all, retire the card immediately.

Even without a formal test, intermittent write failures during bursts and lost images are enough reason to stop using it for important photos. Flash cards can fail unpredictably, and when they do, data loss is often unrecoverable.

Good practice: use multiple smaller cards rather than relying on one card, carry spares, and format cards in the camera before shooting. But in this case, the safest answer is simple: don’t trust that card anymore.