A holomorphic vector bundle analogue for multiply covered Lagrangians is the (multiple) extension of the bundle by itself, such as the $E^{\prime}$ fitting into a short exact sequence $0\to E\to E^{\prime}\to E\to 0$. In the HYM setting these are prototypical sources of semistable but not stable bundles, and it would not be surprising if similar phenomenon happens in the Thomas-Yau program.