diff --git a/src/script/sign.cpp b/src/script/sign.cpp
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -157,10 +157,15 @@
             ret.push_back(valtype());
             for (size_t i = 1; i < vSolutions.size() - 1; ++i) {
                 CPubKey pubkey = CPubKey(vSolutions[i]);
-                if (ret.size() < required + 1 &&
-                    CreateSig(creator, sigdata, provider, sig, pubkey,
+                // We need to always call CreateSig in order to fill sigdata
+                // with all possible signatures that we can create. This will
+                // allow further PSBT processing to work as it needs all
+                // possible signature and pubkey pairs
+                if (CreateSig(creator, sigdata, provider, sig, pubkey,
                               scriptPubKey)) {
-                    ret.push_back(std::move(sig));
+                    if (ret.size() < required + 1) {
+                        ret.push_back(std::move(sig));
+                    }
                 }
             }
             bool ok = ret.size() == required + 1;