OBS Multiplatform 0.12.0 (not yet released) will add stream delay with a new feature "Preserve cutoff point" which will make sure no video is lost, when you have a disconnect.

Commit on GitHub

[quote=jp9000] Additionally, a new option was added to preserve stream cutoff point on disconnections/reconnections, so that if you get disconnected while streaming, when it reconnects, it will reconnect right at the point where it left off. This will probably be quite useful for a number of applications ... for example, a critical stream such as a tournament stream from getting any of its stream data cut off. [/quote]