diff --git a/DESCRIPTION b/DESCRIPTION
index 5cb1eada..e434d924 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: blavaan
 Title: Bayesian Latent Variable Analysis
-Version: 0.5-3
+Version: 0.5-3.1229
 Authors@R: c(person(given = "Edgar", family = "Merkle",
                     role = c("aut", "cre"),
                     email = "merklee@missouri.edu",
diff --git a/NEWS.md b/NEWS.md
index 76a7f208..2b01fe38 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -13,6 +13,9 @@
 
 * Bugs from 0.5-2 are fixed.
 
+## Bugs/glitches discovered after the release:
+* Some models with exogenous covariates, fixed.x=TRUE, and missing data fail to converge and yield implausible parameter values (reported by DeAnne Hunter).
+
 
 # Version 0.5-2
 ## New features
diff --git a/inst/stan/stanmarg.stan b/inst/stan/stanmarg.stan
index aa723def..5b79cab5 100644
--- a/inst/stan/stanmarg.stan
+++ b/inst/stan/stanmarg.stan
@@ -1538,8 +1538,10 @@ model { // N.B.: things declared in the model block do not get saved in the outp
 	// sufficient stats
 	target += multi_normal_suff(YXbarstar[mm, 1:Nobs[mm]], Sstar[mm, 1:Nobs[mm], 1:Nobs[mm]], Mu[grpidx, obsidx[1:Nobs[mm]]], Sigmainv[mm, 1:(Nobs[mm] + 1), 1:(Nobs[mm] + 1)], r2 - r1 + 1);
       
-	if (Nx[mm] > 0) {
-	  target += -multi_normal_suff(YXbarstar[mm, xdatidx[1:Nx[mm]]], Sstar[mm, xdatidx[1:Nx[mm]], xdatidx[1:Nx[mm]]], Mu[grpidx, xidx[1:Nx[mm]]], sig_inv_update(Sigmainv[grpidx], xidx, Nx[mm], p + q, logdetSigma_grp[grpidx]), r2 - r1 + 1);
+	if (Nx[mm] > 0 && !missing) {
+	  target += -multi_normal_suff(YXbarstar[mm, xdatidx[1:Nx[mm]]], Sstar[mm, xdatidx[1:Nx[mm]], xdatidx[1:Nx[mm]]], Mu[grpidx, xidx[1:Nx[mm]]], sig_inv_update(Sigmainv[mm], xidx, Nx[mm], p + q, logdetSigma_grp[grpidx]), r2 - r1 + 1);
+	} else if (Nx[mm] > 0) {
+	  target += -multi_normal_lpdf(YXstar[r1:r2,xdatidx[1:Nx[mm]]] | Mu[grpidx, xidx[1:Nx[mm]]], Sigma[grpidx, xidx[1:Nx[mm]], xidx[1:Nx[mm]]]);
 	}
       }
     }