From a recent paper, Three new 2+2 quadruple systems with changing inclination
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In particular, CzeV4315, one of the systems presented in the paper (Section 5.1), is possibly more interesting to folks here. The eclipse depth of pair B is predicted to increase to the extent that it will overshadow the pair A (currently the deeper one) in a few years. It’s also relatively bright (~= 9.6 V) with a short period (~0.9 day).
See the trend in TESS data (figure 1 of the paper):
The eclipses of pair B grew from non-existing in TESS sector 14 (2019 July) to > 0.01 Tmag in sector 75 (2024 Feb).
Disentangled signals of the two pairs (figure 2):
Also, eclipse timing variation is also observed and presented in the paper.