v2 (2026-07-08): adds reachability analysis of the four channels and first archival constraints, including a ranked 39-target follow-up list; see Version note in the text. Non-singular black hole models generically replace the classical singularity with a quantum bounce, after which the collapsed matter is re-ejected through a white-hole phase. Existing phenomenology assumes the ejection propagates to the causal future of the collapse. This note examines the alternative gluing: a throat that closes onto the causal past of the same mass, so that the ejected matter reconstitutes the very cloud whose collapse produced the black hole. The resulting configuration is a self-consistent causal loop requiring no exotic matter and no remnant. Consistency conditions are derived: (i) only fully thermalized matter can populate the loop, which turns the Novikov self-consistency principle from a postulate into an automatic property; (ii) energy balance forces a minimum ambient density, ρₘin = 3ε/ (4πGT²) ≈ 2ε·ρcrit (epoch), so isolated loops are impossible and loop events must correlate with overdense environments. The scenario predicts a four-event signature localized on the sky: a combined electromagnetic–gravitational transient without optical counterpart; an anomalously primordial gas cloud, deuterium-depleted and helium-enriched along a mixing line; a gravitational-wave signal without ringdown; and the silent disappearance of the resulting black hole. The interval between the last two events measures the bounce time τ directly. The bounce law τ (M) is kept as a free function; it is shown that the observable late-mass window is logically incompatible with the τ ∝ M² scaling of Planck-star models, so a single registered event discriminates between the two frameworks. A galaxy-seeding corollary relevant to early massive galaxies is discussed. Files include a Russian-language version of the preprint (causalₗoopₚreprintᵣu. pdf) and vector sources of both figures (SVG). Русскоязычная версия препринта включена в файлы записи.
Semyon Bochkaryov (Tue,) studied this question.